The radius of the disk is R, and the mass of the disk is M. Using the parallel axis theorem and theequation for the moment of inertia of a disk about its central axis developed in the previous example, Eq. (8), the moment of inertia of the disk about the specified axis is Fig.
Short Circuits. Short circuits are the second most common reason for breaker tripping and are a more serious concern. Short circuits occur when the black hot wires inside your electrical service panel come in contact with either other hot wires or neutral wires.
Surge. Alternatively known as a line surge or power surge, a surge is a short, fast rise in voltage that inherently causes an increase in electrical current or vice versa. Exclusive to electrical circuits, a power surge can cause damage or impairment to a computer or other devices.For example, the standard voltage rating on a landline in the United States is 120V. If this rating is exceeded for more than three nanoseconds, it would be considered a surge, any shorter duration is a spike.Tip: Users can help prevent damage from power surges with surge protectors.or example, the standard voltage rating on a landline in the United States is 120V. If this rating is exceeded for more than three nanoseconds, it would be considered a surge, any shorter duration is a spike.